JP2004340146A - Method of controlling and adding reducing agent to exhaust gas containing nitrogen oxide - Google Patents
Method of controlling and adding reducing agent to exhaust gas containing nitrogen oxide Download PDFInfo
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- JP2004340146A JP2004340146A JP2004142337A JP2004142337A JP2004340146A JP 2004340146 A JP2004340146 A JP 2004340146A JP 2004142337 A JP2004142337 A JP 2004142337A JP 2004142337 A JP2004142337 A JP 2004142337A JP 2004340146 A JP2004340146 A JP 2004340146A
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000007789 gas Substances 0.000 title claims abstract description 45
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 230000002829 reductive effect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 238000010531 catalytic reduction reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001038 basic metal oxide Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/281—Interface circuits between sensors and control unit
- F02D2041/285—Interface circuits between sensors and control unit the sensor having a signal processing unit external to the engine control unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
本発明は内燃機関を搭載した自動車に還元剤を噴入して選択的に接触還元することにより窒素酸化物（ＮＯｘ）の含有量を減少させることに関する。 The present invention relates to reducing the content of nitrogen oxides (NOx) by injecting a reducing agent into an automobile equipped with an internal combustion engine and selectively performing catalytic reduction.
内燃機関からのＮＯｘの還元は、従来には選択的接触還元手段（ＳＣＲ）を通して行われている。ＳＣＲにおいてはアンモニアまたは尿素が還元剤として作用する。触媒表面に吸着された時に、還元剤が排ガスからの窒素酸化物と反応して窒素および水を生じる。アンモニアまたは尿素は、水溶液状態でまたは固体としてのまたは水に溶解した尿素として外部ソースからの排気ガスに添加される。尿素が使用される場合には、排ガス中で加熱することによってアンモニアとイソシアン酸に熱分解されるかまたはＳＣＲ触媒上で加水分解されて二酸化炭素およびアンモニアを生ずる。 Conventionally, the reduction of NOx from an internal combustion engine is performed through a selective catalytic reduction means (SCR). In SCR, ammonia or urea acts as a reducing agent. When adsorbed on the catalyst surface, the reducing agent reacts with nitrogen oxides from the exhaust gas to produce nitrogen and water. Ammonia or urea is added to the exhaust gas from an external source in aqueous solution or as urea as a solid or dissolved in water. If urea is used, it is thermally decomposed to ammonia and isocyanic acid by heating in the exhaust gas or hydrolyzed on SCR catalysts to produce carbon dioxide and ammonia.
通常使用されるＶ2 Ｏ5 −ＷＯ3 ／ＴｉＯ2 触媒は、他の塩基性金属酸化物がＳＣＲ活性を有しているとしてもＳＣＲ法で使用される。 V 2 O 5 -WO 3 / TiO 2 catalyst which is normally used, other basic metal oxide is also used in SCR process as having SCR activity.
電子制御装置（ＥＣＵ）は一般に窒素またはアンモニアという還元剤を注入供給するために使用される。これはＮＯｘを還元する触媒の潜在力に相応していなけらばならない。還元能力は触媒の活性、排ガスの温度、排ガスの質量流量および排ガス中のＮＯｘ濃度に左右される。排ガスの酸素含有量および水含有量は還元能力に影響を及ぼすが、僅かな影響しか示さないと考えられる。排ガス質量流量、ＮＯｘ濃度および触媒温度の様な最も重要なパラメータは、公知の方法でおよびディーゼル燃料機関からの排ガスにおけるＮＯｘ制御システムにおいて機関の排ガス−チャンネル内に配置されたセンサーによって測定される。 An electronic control unit (ECU) is generally used to inject and supply a reducing agent such as nitrogen or ammonia. This must be commensurate with the potential of the catalyst to reduce NOx. The reducing ability depends on the activity of the catalyst, the temperature of the exhaust gas, the mass flow rate of the exhaust gas, and the NOx concentration in the exhaust gas. It is believed that the oxygen and water contents of the exhaust gas affect the reducing capacity, but have only a small effect. The most important parameters such as exhaust gas mass flow, NOx concentration and catalyst temperature are measured in a known manner and in a NOx control system in the exhaust gas from a diesel fuel engine by sensors arranged in the exhaust gas channel of the engine.
測定されたデータは次にＥＣＵに伝達され、そこにおいてそのデータはアルゴリズムによって、排ガス流中への還元剤の制御注入するための計量供給ポンプへ送られる適当な出力信号に変換される。 The measured data is then transmitted to an ECU, where the data is converted by an algorithm into an appropriate output signal which is sent to a metering pump for controlled injection of reductant into the exhaust gas stream.
公知のシステムにおいてはセンサーからのデータは、自動車の電装分野によって誘導される電磁気障害で該データが攻撃され易いアナログ法でＥＣＵに伝達される。それ故にセンサーデータの電磁的スクランブルを制限するために、センサーに近い距離にＥＣＵを配置する必要がある。 In known systems, the data from the sensors is transmitted to the ECU in an analog manner, which makes the data vulnerable to electromagnetic disturbances induced by the field of motor vehicle electronics. Therefore, in order to limit the electromagnetic scrambling of the sensor data, it is necessary to arrange the ECU at a distance close to the sensor.
センサーとの関係でのＥＣＵの位置に関する制限は、特にセンサーおよびＥＣＵよりなるＮＯｘ還元システムを備えた既存の自動車の改造において重大な問題である。更に上述の種類のＮＯｘ還元システムにおいては、例えば機関隔室中のセンサーによって監視しなければならない機関データーが還元剤注入の制御時に利用される場合には自動車中にＥＣＵを配置することが困難である。 The limitation on the position of the ECU in relation to the sensor is a significant problem, especially in retrofitting existing vehicles with a NOx reduction system consisting of the sensor and the ECU. Further, in the above-mentioned type of NOx reduction system, it is difficult to arrange an ECU in a vehicle when engine data that must be monitored by a sensor in the engine compartment is used for controlling the injection of the reducing agent. is there.
それ故に本発明の課題は、特にセンサーデータを伝達することに関連して還元剤を制御添加する公知のシステムおよび方法を改善することである。 It is therefore an object of the present invention to improve the known systems and methods for controlled addition of reducing agents, especially in connection with transmitting sensor data.
従って本発明は、排ガスに添加される還元剤の量が排ガス値および／または機関値をベースとして計量され、該値がセンサーによって測定されそしてセンサーデータが排ガスに添加される還元剤の量を計量するための電子制御装置に伝達される、窒素酸化物を選択還元性の触媒との接触下に還元材と反応させる、窒素酸化物含有の自動車機関排ガス中への還元剤の添加量を制御する改善された還元剤添加方法において、その改善が一連のインターフェースによってセンサーデータを電子制御装置に伝達することを特徴とする、上記方法に関する。 Accordingly, the present invention provides a method wherein the amount of reducing agent added to the exhaust gas is measured based on the exhaust gas value and / or the engine value, the value is measured by a sensor and the sensor data measures the amount of reducing agent added to the exhaust gas. To control the amount of the reducing agent added to the exhaust gas of an automobile engine containing nitrogen oxides by causing the nitrogen oxides to react with the reducing agent in contact with a selective reducing catalyst, An improved method for adding a reductant, wherein the improvement comprises transmitting sensor data to an electronic controller via a series of interfaces.
更に本発明は、窒素酸化物の接触還元のために窒素酸化物含有排ガス中に還元剤を供給するための改善されたシステムにおいて、該システムを本発明の方法を運転するために使用することである。 Further, the present invention provides an improved system for supplying a reducing agent in a nitrogen oxide-containing exhaust gas for the catalytic reduction of nitrogen oxides, wherein the system is used to operate the method of the present invention. is there.
本発明に従う方法およびシステムの重要な構成要素は一連のインターフェースを用いてセンサーデータを電子制御装置（ＥＣＵ）に伝達することであり、それによって自動車の電装域により誘発される電磁障害を回避することである。センサーは、センサーから離れた位置にＥＣＵを配置することを可能とする一連のインターフェースを備えている。 An important component of the method and system according to the present invention is to transmit the sensor data to an electronic control unit (ECU) using a series of interfaces, thereby avoiding the electromagnetic interference induced by the motor vehicle electrical domain. It is. The sensor has a series of interfaces that allow the ECU to be located remotely from the sensor.
別の長所としては、センサーからのアナログ信号を測定するための回路の代わりに一連のインターフェースを備えたＥＣＵが機関隔室に置かれていてもよい空気流動センサーに直接的にまたはそれの近くに取り付けられた一連のインターフェースによって伝達される。 Another advantage is that instead of a circuit for measuring the analog signal from the sensor, an ECU with a series of interfaces is directly or close to the air flow sensor, which may be located in the engine compartment. It is communicated by a series of attached interfaces.
本発明の方法を実施するためには、窒素酸化物濃度、還元触媒の導入口の所での排ガス温度および還元性触媒の出口における排ガス温度の少なくとも一つを監視する必要がある。更に、ある機関運転値、特に機関への取り入れ空気の流量を測定するのが有利である。 In order to carry out the process according to the invention, it is necessary to monitor at least one of the nitrogen oxide concentration, the exhaust gas temperature at the inlet of the reducing catalyst and the exhaust gas temperature at the outlet of the reducing catalyst. In addition, it is advantageous to measure certain engine operating values, in particular the flow of intake air to the engine.
機関への取り入れ空気流の測定値および排ガス中の酸素濃度の測定値は排気ガス質量流の計算を可能とする。排ガスおよび入口空気流の酸素濃度から燃料消費量が導き出せる。その時に分子流として燃料消費量を、排ガス分子流をもたらす機関入口分子流に添加する。排ガスの平均分子量を知ることによってこの適用量を十分に正確に算出することができる。 Measurements of the intake air flow to the engine and of the oxygen concentration in the exhaust gas allow the calculation of the exhaust gas mass flow. Fuel consumption can be derived from the exhaust gas and the oxygen concentration in the inlet air stream. The fuel consumption is then added as a molecular stream to the engine inlet molecular stream which results in an exhaust gas molecular stream. By knowing the average molecular weight of the exhaust gas, this application amount can be calculated sufficiently accurately.
上記の様に算出することによって排ガス質量流の決定は、従来技術で一般に適用される排ガス−チャンネルに配置される多大な費用の掛かる排ガス流センサーを使用する代わりに、取り入れ空気流および酸素濃度のための低い費用のセンサーで測定されるデータに基づいている。 By calculating as described above, the determination of the exhaust gas mass flow determines the intake air flow and oxygen concentration instead of using a costly exhaust gas flow sensor located in the exhaust gas channel commonly applied in the prior art. Based on data measured by low cost sensors for.
ＮＯｘ質量流は触媒の上流のおよび尿素注入点の、ＮＯｘセンサーまたは他の分析器から伝達される排ガス中ＮＯｘ濃度のデータに基づきＥＣＵによって算出される。空気流センサーと同じ理由でＮＯｘセンサーは一連のインターフェース、好ましくはController Area Network, CAN interfaceを備えており、一連のリンクを通して電子制御装置に連絡することができる。 The NOx mass flow is calculated by the ECU based on NOx concentration data from the exhaust gas transmitted from the NOx sensor or other analyzer upstream of the catalyst and at the urea injection point. For the same reasons as airflow sensors, NOx sensors are equipped with a series of interfaces, preferably a Controller Area Network, CAN interface, which can communicate with the electronic control unit through a series of links.
CAN ブースは元は、自動車用途のためにBosch 社によって開発された。これは厳しい電気的環境に置くために創造された高速の一連データ−ネットワークである。これは、情報の調整に基づいて有害でない優先事項を使用することによって基本設計において予測および潜在性の沢山の問題に答えている。 The CAN booth was originally developed by Bosch for automotive applications. This is a high-speed serial data network created for placing in harsh electrical environments. It answers a number of issues of prediction and potential in the basic design by using non-harmful priorities based on coordination of information.
触媒のＮＯｘ還元潜在性を予測すためには排ガス中の温度を測定しなければならない。空気流センサーと同じ理由で温度センサーも、添付の図面に概略的に示した様な一連のリンクを介して電子制御装置と連絡することができる一連のインターフェース、好ましくはＣＡＮインターフェースを備えていてもよい。 In order to predict the NOx reduction potential of the catalyst, the temperature in the exhaust gas must be measured. For the same reason as the airflow sensor, the temperature sensor may also have a series of interfaces, preferably a CAN interface, which can communicate with the electronic control via a series of links as schematically shown in the accompanying drawings. Good.
Claims (7)
At least one sensor for providing data on exhaust gas composition and / or conditions and / or a sensor for engine operation, and an electronic control unit for processing the data and for metering the amount of reducing agent added to the exhaust gas An addition system for controlling the amount of a reducing agent added to a nitrogen oxide-containing automobile engine exhaust gas, the sensor comprising a series of interfaces for transmitting sensor data to an electronic control unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA200300723 | 2003-05-13 |
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| JP2004340146A true JP2004340146A (en) | 2004-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2004142337A Withdrawn JP2004340146A (en) | 2003-05-13 | 2004-05-12 | Method of controlling and adding reducing agent to exhaust gas containing nitrogen oxide |
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| Country | Link |
|---|---|
| US (1) | US20040226286A1 (en) |
| EP (1) | EP1477655A1 (en) |
| JP (1) | JP2004340146A (en) |
| CN (1) | CN1609420A (en) |
| CA (1) | CA2467178A1 (en) |
| RU (1) | RU2004114304A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009524765A (en) * | 2006-01-27 | 2009-07-02 | ピールブルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Apparatus for reducing nitrogen oxides in exhaust gas of internal combustion engines |
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| US20070042495A1 (en) * | 2005-08-22 | 2007-02-22 | Detroit Diesel Corporation | Method of controlling injection of a reducing agent in an engine emissions control system |
| DE102006061732A1 (en) * | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Liquid reducing agent dosage device for reduction of nitrogen oxides in exhaust gas, has storage container connected with work container, and storage pump for pumping liquid reducing agent from storage container to work container |
| FR2919666B1 (en) * | 2007-08-03 | 2009-10-09 | Peugeot Citroen Automobiles Sa | SYSTEM FOR MANAGING A DISTRIBUTION CIRCUIT OF A REAGENT IN AN EXHAUST LINE |
| US8713917B2 (en) * | 2007-08-30 | 2014-05-06 | GM Global Technology Operations LLC | Method for reducing NH3 release from SCR catalysts during thermal transients |
| CN102998355B (en) * | 2012-12-17 | 2016-01-13 | 潍柴动力股份有限公司 | A kind of method and system of engine off-line test discharged nitrous oxides |
| SE542332C2 (en) * | 2018-04-24 | 2020-04-14 | Scania Cv Ab | Method and system for control of an activation of at least one liquid sensitive sensor |
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| JPH1047048A (en) * | 1996-08-02 | 1998-02-17 | Toyota Motor Corp | Emission control device for internal combustion engine |
| DE19704558A1 (en) * | 1997-02-06 | 1998-08-13 | Siemens Ag | Process and device for catalytic exhaust gas cleaning and incineration plant |
| DE19728349A1 (en) * | 1997-07-03 | 1999-01-07 | Telefunken Microelectron | Sensor arrangement and engine control device for an internal combustion engine |
| DE19736384A1 (en) * | 1997-08-21 | 1999-02-25 | Man Nutzfahrzeuge Ag | Method for metering a reducing agent into nitrogen oxide-containing exhaust gas from an internal combustion engine |
| DE19740702C1 (en) * | 1997-09-16 | 1998-11-19 | Siemens Ag | Exhaust purification system management for e.g. lean-running diesel engine |
| DE19743337C1 (en) * | 1997-09-30 | 1999-01-07 | Siemens Ag | Nitrous oxide reduction system for cleaning diesel engine exhaust gas |
| DE19749400C2 (en) * | 1997-11-07 | 2001-11-29 | Siemens Ag | Process for reducing the NOX content in the exhaust gas of a diesel engine |
| DE19807215C2 (en) * | 1998-02-20 | 2000-06-08 | Siemens Ag | Control system for an internal combustion engine |
| DE19814386C2 (en) * | 1998-03-31 | 2000-06-08 | Siemens Ag | Method and device for the catalytic removal of nitrogen oxides in the exhaust gas of an incineration plant |
| DE19819579C1 (en) * | 1998-04-30 | 1999-09-30 | Siemens Ag | Secondary treatment of exhaust from lean burn diesel engine with SCR catalyst, minimizing pump usage and energy consumption |
| US6357226B2 (en) * | 1998-10-22 | 2002-03-19 | Chrysler Corporation | Control system for lean air-fuel ratio NOx catalyst system |
| US6427439B1 (en) * | 2000-07-13 | 2002-08-06 | Ford Global Technologies, Inc. | Method and system for NOx reduction |
| DE10048808A1 (en) * | 2000-09-29 | 2002-04-18 | Bosch Gmbh Robert | Method and device for controlling operational processes |
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| US6725651B2 (en) * | 2000-11-16 | 2004-04-27 | Toyota Jidosha Kabushiki Kaisha | Reducing agent for emission control system, reducing-agent supply device, and emission control system using the reducing agent |
| DE10139142A1 (en) * | 2001-08-09 | 2003-02-20 | Bosch Gmbh Robert | Exhaust gas treatment unit and measuring device for determining a concentration of a urea-water solution |
| WO2003067350A2 (en) * | 2002-02-05 | 2003-08-14 | Cleaire Advanced Emission Controls | Apparatus and method for simultaneous monitoring, logging, and controlling of an industrial process |
| JP3951774B2 (en) * | 2002-03-29 | 2007-08-01 | 三菱ふそうトラック・バス株式会社 | NOx purification device for internal combustion engine |
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2004
- 2004-04-30 EP EP04010280A patent/EP1477655A1/en not_active Withdrawn
- 2004-05-05 US US10/838,367 patent/US20040226286A1/en not_active Abandoned
- 2004-05-12 JP JP2004142337A patent/JP2004340146A/en not_active Withdrawn
- 2004-05-12 CA CA002467178A patent/CA2467178A1/en not_active Abandoned
- 2004-05-12 RU RU2004114304/06A patent/RU2004114304A/en not_active Application Discontinuation
- 2004-05-13 CN CNA2004100477892A patent/CN1609420A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009524765A (en) * | 2006-01-27 | 2009-07-02 | ピールブルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Apparatus for reducing nitrogen oxides in exhaust gas of internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1609420A (en) | 2005-04-27 |
| CA2467178A1 (en) | 2004-11-13 |
| RU2004114304A (en) | 2005-10-27 |
| US20040226286A1 (en) | 2004-11-18 |
| EP1477655A1 (en) | 2004-11-17 |
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